qcacld-3.0: Reduce mlme logging level from err to debug

In wlan_mlme_configure_chain_mask(),mlme_legacy_err is
updated to mlme_legacy_debug,as its not an error condition.

Change-Id: Ibdf33124ee970bcfcc9d57df9f3b3fc6990072fe
CRs-Fixed: 2599510
1 file changed